Controlling-valve for steam-turbines.



R. E'. EFFERT.v

- CONTROLLING VALVE FOR STEAM TURBINES.

Pamegd Feb. 29,1916.

2 SHEETS-SHttT l.

l R. R. DEFFERT. A CONTROLLING VALVE FOR STEAM TURBINES. 4

APPLICATION FILED MAY15. 1915.v

Patented Feb. 29,1916.

2 SHEETS-SHEET 2.

UNITED sTATEs PATENT onirica.I

RICHARD R. DEFFERT, OF MANVILLE, NEW JERSEY.

CONTROLLING-VALVE FORA STEAM-TURBINES.

Specification of Letters Patent.

Patented Feb. 29, 1916.

Application led May 15, 1915. Serial No. 28,262.

To all 'whom 'it may'concem Y Be it known that I, RiorrARo R. DEFFERT, acitizen of the United States, and residing at Manville, in the county-ofSomerset and State of New Jersey, have invented certain new and usefulImprovements in Controlling-Valves for Steam-Turbines, of whichv andautomatically controlled by the load on Y 'or applied to the engine; andwith th1s and other objects in view the invention consists in a device'or apparatus] of the class-specified, constructed and operated ashereinafter described andclaimed.

. The invention is fully disclosed in the following specification, Aotwhich the ,accompanying drawings form a part, in which the separateparts of my improvement are designated by suitable reference charactersin each of the views, and in which:

Figure 1 is a' section on the line 1 1 of Fig. 2; Fig. 2 a section onthe line 2 2 of Fig. 1; Fig. 3 a sectional and diagrammatic view of thecomplete device or. apparatus made according to my invention; Fig. 4 aview on an enlarged scale of a part of the construction shown in Fig.3,'and showing the separate parts of said construction in a differentposition;-Fig. 5 a side view looking in the direction of the arrow 5 ofFig. 1 but omitting part of the construction shown in Fig.' 1: F ig. 6 atransverse section on the line 6 6 of Fig. 5' and on the line 6 6 ofFig, 1; Fig. 7 a section on the line'- 7 7 of Fig. 8; Fig. 8 a sectionon the line 8 8 of Fifr."7; and, Fig.J 9 a'sideview of a detail oftheconstruction shown in Figs. f? and 8.

In the 'accompanying drawings, I have shown at a' the main steam supplypipe of a steampdri Jen turbine. said pipe being provided with the usualvalve [control device a2, and at o. I have vshown the casing in whichthe rotor b2 is4 mounted, said rotor being mounted on and secured to ashaft b3 having a supportingframe shown, or f. partrllfyshown at c, andon which is mounted and to which lis secured a valve casing d.

y The rotor b2 is provided with pockets b* which may be of the usual, orany preferred form, and the frame c is provided with a head c2 on whichthe valve casing Z rests, land said valve casing (Z is cylindrical inform and the bottom thereof is provided witlrports or passages cl2,three of which are shown and which communicate with corresponding portsor passages c3 in the head 02. of the frame c, and the ports or-passages03 are L-shaped inform, as shown inl Fig. 1,

and discharge into the pockets b* of the rotor through tangentialdischarges c in a plate c5 secured in the face of the-head o2, asclearly shown in Figs. 1, 5 and 6.

The steam supply pipe a is onnect'ed with one end of the valve .casing dandthe opposite end of said valve casing is provided with a stuing box[Z3 through which is passed a valve shaft e provided at its outer endwith a gear e2 which meshes with a vertically arranged rack bar e3, thelower end of which is provided with a shaft e* which passes into thecylinder e5 of an ordinary steam pump device and is provided withapiston 6.6 movable in said cylinder, and the cylinder"v 0.5 is providedwith the usual valve casing f supplied by a pipe g which leads to andcommunicates with the vmain steam supply pipe at g2, and the valvecasing f is also provided with a discharge pipe g3.

The steam pump deviceinvolving the cylinder e5 and its connectedpartsforms no part of my invention and any suitable device of this'class'maybe employed.

The valve casing f is provided with a. main steam passage f2 with whichthe pipe g communicates and, with supplemental steam passages]3 and f4which communicate with the cylinder e5, and said passages jf? and f* areplaced in communication in the usual manner, and said comi'nunication iscontrolled by a valve shaft .5. which passes into the casing f and isconnected at its Vouter end with an operating lever i having a forkedhead 2 which operates iuvcounection w1th a sleeve 3 forming party? agovernor z mounted on a vertically arranged shaft 5 and provided with a:gear ai which meshes with another gear 7 on the rotor shaft b3.

The valve shaft e which passes into the' and at its inner ond 'withl`its opposite sides with transverse i isprovided Within a hearing c, asaid shaft is provided at intervals and on valve casing of vwhich areshown, but any desired number of which may be employed'.l it l :ingiun-lderstood that this is also true of the ports ,or passages Z2 and c3which are controlled 'by the valve devices 7c, the faces of the valvedevices 7c' are provided with pockets 7:2 and 7:3, and the valve devices7c, or the faces thereodec'rease in dimensions circumferentially fromright to left, or in the direction of the steam supply pipe a, and theoliiect of this construction is to control or increase or decrease thesupply of steam to the rotor according to conditions under which saidrotor is Working` and one object of the pockets it? and lf3 in the facesof the valve .devices is to reduce friction between said valve devicesand the Walls of the valve easing d which they operate.

` lt will beundcrstood that in the operation of this'device, the valveshaft c oscillates only through about a quarter of a revolution and theinner wall ci the valve casing d in connection with which the valvedevices i; operate is provided with grooves 'a through which the steamis free to pass and through which steam is admitted to the pockets'17.52

and 7c3 in the valve devices 1, and the ohject of this construction isto reduce the force of the springs 'm and to cause less friction hetWeenthe valve devices and the wall or Walls of the valve casing (Z. I Instarting the engine the valve devices' are in the position shown in Fig.S and the ports or passages (Z2 are open, and the steam is admitteddirectly to the rotor and the op` eration of the rotoris controlled bythe governor-z't. It' the speedof therotor increases from anyA causebeyond' a predetermined or the desired point, the shaft e is turned sothat the valve devices /t' mill gradually cutol" the supply of steamand, of course, the

increase or decrease of the lead under which "the engine i's workingwill automatically produce the same result, and in this Wav the steamsupply is automaticallv conti lied under all conditions7 and said supplyiis `gradually increased or decreased according to the conditions underwhich the engine' is Working. and in this Wag a uniform operationroit'neengine is produced under all con incasso ditions and Without `iolt, orjar, the steam supply `being gradually and automatically increased, orgradually and automatically decreased according .to the load, or otherdeiansls placed upon the engine.

it must be borne in mind that the steam is discharged through the portsor passages 03 into or onto the rotor at dilierent points in itsperimeter', and any desired number of the said ports or passages and thevalve devices /t may be employed and 1n this way the iiuniher of ports or. passages discharging this arrangement 'of said ports or passages isalso not necessary, and various changes in and modilcations of theconstruction forming a basis of this invention, as herein shown anddescribed, -may be made Within the scope of the appended claims withoutdeparting from the spirit of said invention or sacrificing itsadvantages.

Having fully described my invention, what Lclaim as new and desi-re tosecure by Letters Patent, is

A valve controlling device for steam turbine engines, comprising acylindrical casing one side of which is provided With a 'plurality oflongitudinally arranged ports or passages, and a valve shaft mounted insaid casing and provided with radially arranged and radially movablevalve devices adapted t-ocontrol said ports or passages.

2. A valve controlling device for steam turbine engines, comprising acylindrical casing one side of Whichis provided with a plurality oflongitudinally arranged ports or passages, and a valve shaft mounted insaid casing and provided with radially arranged and radially movableValve devices adapted to control said ports or passages and the bearingsurfaces of which are of different circumferential dimensions.

3. A valve controlling device for steam turbine engines, comprising acylindrical casing provided with a plurality of ports or passages, and avalve shaft mounted in said casing and provided with a plurality of.Avalve devices controlling said ports or pas,- sages and whereby saidports or passages may 'ce gradually opened or gradually closd, saidvalve devices being radially movable and being operated in one directionby springs.

4. A valve .controlling device for steam turbines. comprising acylindrical casing provided with a plurality of ports or passages, avalve shaft mo'unted in saidl casing, automatic means for giving saidshaft a rotary Oscillating movement, said shaft being I0 provided with aplurality of ports or passages, a valve shaft mounted in said casing,

reduced'at intervals to form Webs, and valve devices mounted on andradially movable on said Webs and-adapted to control said ports orpassages. v

y5.,Al valve'fccfntrolling device for steam turbines, comprising acylindrical casing automatic means for giving said shaft a rotaryoscillatingmovement, said shaft being reduced at intervals to form Webs,valve devices mounted on and radially movable on said Webs'and adaptedto controlsaid ports or passages, and springs placedin said ValveRICHARD R. DEF-FERTE.

Witnesses: y C. MULREANY,

H. E. THOMPSON.

